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nfsd: clean up mounted_on_fileid handling

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We only need the inode number for this, not a full rack of attributes.
Rename this function make it take a pointer to a u64 instead of
struct kstat, and change it to just request STATX_INO.

Signed-off-by: Jeff Layton <jlayton@kernel.org>
[ cel: renamed get_mounted_on_ino() ]
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
This commit is contained in:
Jeff Layton 2022-09-08 12:31:07 -04:00 committed by Chuck Lever
parent 7518a3dc5e
commit 6106d9119b
1 changed files with 9 additions and 7 deletions
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16
fs/nfsd/nfs4xdr.c
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@ -2769,9 +2769,10 @@ static __be32 fattr_handle_absent_fs(u32 *bmval0, u32 *bmval1, u32 *bmval2, u32
}
static int get_parent_attributes(struct svc_export *exp, struct kstat *stat)
static int nfsd4_get_mounted_on_ino(struct svc_export *exp, u64 *pino)
{
struct path path = exp->ex_path;
struct kstat stat;
int err;
path_get(&path);
@ -2779,8 +2780,10 @@ static int get_parent_attributes(struct svc_export *exp, struct kstat *stat)
if (path.dentry != path.mnt->mnt_root)
break;
}
err = vfs_getattr(&path, stat, STATX_BASIC_STATS, AT_STATX_SYNC_AS_STAT);
err = vfs_getattr(&path, &stat, STATX_INO, AT_STATX_SYNC_AS_STAT);
path_put(&path);
if (!err)
*pino = stat.ino;
return err;
}
@ -3277,22 +3280,21 @@ out_acl:
*p++ = cpu_to_be32(stat.btime.tv_nsec);
}
if (bmval1 & FATTR4_WORD1_MOUNTED_ON_FILEID) {
struct kstat parent_stat;
u64 ino = stat.ino;
p = xdr_reserve_space(xdr, 8);
if (!p)
goto out_resource;
/*
* Get parent's attributes if not ignoring crossmount
* and this is the root of a cross-mounted filesystem.
* Get ino of mountpoint in parent filesystem, if not ignoring
* crossmount and this is the root of a cross-mounted
* filesystem.
*/
if (ignore_crossmnt == 0 &&
dentry == exp->ex_path.mnt->mnt_root) {
err = get_parent_attributes(exp, &parent_stat);
err = nfsd4_get_mounted_on_ino(exp, &ino);
if (err)
goto out_nfserr;
ino = parent_stat.ino;
}
p = xdr_encode_hyper(p, ino);
}